MESON Chess Problem Database

Problem Display
PID: 206508 (8/8/8/8/3p4/8/N2Q4/rk1Kn3 w - - 0 1)

Palatz, Franz Ferdinand Ludwig

L'Eclaireur du Soir, 1925

8/8/8/8/3p4/8/N2Q4/rk1Kn3

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Qc1#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sg2
      • 2.Qc2#
    • 1...Sd3
      • 2.Qc2#
    • 1...Sf3
      • 2.Qc2#
    • 1...d3
      • 2.Sc3#
  • Tries
    • 1.Kxe1?
      • 1...d3
        • 2.Sc3#
      • 1...Rxa2!
    • 1.Qe2?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sg2
        • 2.Qc2#
      • 1...Sd3
        • 2.Qc2#
      • 1...Sf3
        • 2.Qc2#
      • 1...d3
        • 2.Sc3#
      • 1...Rxa2!
    • 1.Qf2?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sg2
        • 2.Qc2#
      • 1...Sd3
        • 2.Qc2#
      • 1...Sf3
        • 2.Qc2#
      • 1...d3
        • 2.Sc3#
      • 1...Rxa2!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qc1#
      • 1...Sd3
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(a);SBLOCK,XS(B)::QAR1(C)
    • S(c);N_GUARD::QAB1(C),XS(c)
    • S(c);N_GUARD::QAB1(C)
    • P(d);N_GUARD::S(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(c)
      • Vars
        • P(d);N_GUARD::S(B)
      • Refutation
        • R(a);XS(B)
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(c);N_GUARD::QAB1(C)
        • P(d);N_GUARD::S(B)
      • Refutation
        • R(a);XS(B)
    • Try
      • Q(C);
      • Vars
        • S(c);N_GUARD::QAB1(C),XS(c)
        • S(c);N_GUARD::QAB1(C)
        • P(d);N_GUARD::S(B)
      • Refutation
        • R(a);XS(B)
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • S(c);N_GUARD::QAB1(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).